Is the vacuum stable?

Details Is the vacuum stable? Is the vacuum stable?

1996-08-15

arxiv.org/abs/hep-ph/9608340v1

Phys.Lett. B391 (1997) 29-33

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, plain latex, postscript file also available at ftp://dept.physics.upenn.edu/pub/Kusenko/UPR709T.ps

Scientific paper

10.1016/S0370-2693(96)01470-0

The experimental data, as well as theoretical considerations allow (and, in some cases, require) the Universe at present to rest in a false vacuum, whose approximate stability imposes constraints on the model parameters. Under very general and mild conditions, the Universe would have ended up in the standard vacuum even if the potential has deeper minima, provided there was a period in which the temperature was > 1 TeV. In many cases, the zero temperature tunneling rate is much smaller than the inverse age of the Universe. Future experiments may reveal that the physical vacuum is not entirely stable. Implications for the cosmological constant are discussed.

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